Injections Glutathione injections deliver the antioxidant directly into the bloodstream, allowing for quicker and more concentrated effects
Chang, Chung-Hsun et al
What Are The Side Effects of Glutathione IV Therapy
While glutathione supplements are broadly suitable for almost anyone who wants to increase their body's capacity to combat oxidative stress, they can best serve individuals who wish to prevent, delay, or alleviate specific chronic health conditions associated with glutathione depletion:15 Neurodegenerative disorders such as Alzheimer's and Parkinson's Respiratory diseases like asthma and COPD Cardiovascular diseases like hypertension and high cholesterol Age-related diseases like cataracts, macular degeneration, and hearing impairment Immune diseases like HIV and AIDS Liver disease Cystic fibrosis Additionally, because the goal is to reduce oxidative stress, people who are regularly exposed to ROS-generating compounds (e.g., smoke, alcohol, and sunlight)23 might consider adding glutathione to their supplement rotation, at least to help counter the effects of oxidative stressors

Mechanism in research literature The most-cited mechanistic finding is that BPC-157 activates the vascular endothelial growth factor receptor 2 (VEGFR2) in vascular endothelial cells (PMID 27847966)
Limited long-term safety data exists for cosmetic glutathione use